Rush 3&Prime, Slip-On Slash Down Mufflers with 1.75&Prime, Baffles 25301-175 3in Muffler Slash Down Cut For performance, quality and sound there is nothing else like a RUSH Performance Slip-On Muffler These mufflers have been engineered through thousands of hours of development, real world application and independently dyno tested in order to guarantee you the best performance and sound in the market RUSH mufflers feature baffles that are wrapped in a high tech mat designed to disperse heat and retain sound